Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector

Distributions sensitive to the underlying event are studied in events containing one or more charged-particle jets produced in pp collisions at √s=7TeV with the ATLAS detector at the Large Hadron Collider (LHC). These measurements reflect 800μb-1 of data taken during 2010. Jets are reconstructed usi...

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Detalles Bibliográficos
Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Exactas
Física
Jets
ATLAS detector
Large Hadron Collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84609
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84609
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Jets
ATLAS detector
Large Hadron Collider
spellingShingle Ciencias Exactas
Física
Jets
ATLAS detector
Large Hadron Collider
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
topic_facet Ciencias Exactas
Física
Jets
ATLAS detector
Large Hadron Collider
description Distributions sensitive to the underlying event are studied in events containing one or more charged-particle jets produced in pp collisions at √s=7TeV with the ATLAS detector at the Large Hadron Collider (LHC). These measurements reflect 800μb-1 of data taken during 2010. Jets are reconstructed using the anti-kt algorithm with radius parameter R varying between 0.2 and 1.0. Distributions of the charged-particle multiplicity, the scalar sum of the transverse momentum of charged particles, and the average charged-particle pT are measured as functions of pTjet in regions transverse to and opposite the leading jet for 4GeV<pTjet<100GeV. In addition, the R dependence of the mean values of these observables is studied. In the transverse region, both the multiplicity and the scalar sum of the transverse momentum at fixed pTjet vary significantly with R, while the average charged-particle transverse momentum has a minimal dependence on R. Predictions from several Monte Carlo tunes have been compared to the data; the predictions from Pythia 6, based on tunes that have been determined using LHC data, show reasonable agreement with the data, including the dependence on R. Comparisons with other generators indicate that additional tuning of soft-QCD parameters is necessary for these generators. The measurements presented here provide a testing ground for further development of the Monte Carlo models.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
title Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
title_short Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
title_full Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
title_fullStr Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
title_full_unstemmed Underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7TeV with the ATLAS detector
title_sort underlying event characteristics and their dependence on jet size of charged-particle jet events in pp collisions at √s = 7tev with the atlas detector
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84609
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